I am a 72 year old American, now in Thailand on a 3o day extension of a tourist visa. Can I change the tourist visa to Non Imm O at the local Chonburi Immigration office, using a combination of SS payments of about 45,000 Baht per month and the remainder in mt Bangkok Bank Account. Or should I go get a Non Imm O at an embassy in Penang or Vientiane.